Before we go into the what DevOps is and the changes it has brought with us, we must first know why DevOps initially. And prior to DevOps existed, it was possible to use two development methods: Waterfall and Agile Method.
1. Waterfall Model
The waterfall model was the first model that was used within software development. It is a process that runs in a series and easy to grasp. With this model, software development is broken down into multiple stages, and the results from one phase becomes an input for the next phase. This is like a waterfall , where the water is flowing off the cliff, but it is unable to return to its original condition.
The phases include: Requirements design, implementation Verification, Maintenance, and Requirements.
The drawbacks of the waterfall model
- It's not easy to make adjustments to the stage that was previously in place
- Not recommended for large-scale projects.
- Testing and developers aren't working together (which could result in many bugs in the at the end)
- Not recommended for projects that are likely to likely be subject to changing requirements. From the picture that follows, it is possible to observe the flaws in this model of waterfalls:
The developer required a long time to release the code
On the operational front the testers was unable to spot issues and provide useful feedback. It is easy to learn DevOps by pursuing DevOps Training
2. Agile Model
Agile is a way of thinking in software development that splits each project into several iterations. In the end, at the conclusion every iteration an actual software product is created. Each iteration takes about 1 to 3 weeks. Each iteration has functional teams working in tandem in various areas, including:
- Requirements
- Design
- Development
- Release
By using the agile method the code that is working for the developer might not be a good fit for the team working on operations.
So , how can this issue be resolved?
With DevOps it is possible to have continuous integration between the deployment of code and evaluation of the code. Monitoring in real-time and immediate feedback via the DevOps continuous monitoring tools lets both the operations and the developer team to work in tandem.
What exactly is DevOps?
DevOps is a collaborative effort between development and operations teams, which allows for continuous delivery of software or services customers.
Benefits of DevOps
- Continuously delivered software
- Improved collaboration between teams
- Easy deployment
- More efficiency and capacity
- Errors can be corrected in the initial phase
- More security
- There is less intervention by hand (which means less chance of errors)
DevOps Lifecycle
Once you understand the reason behind DevOps and what it is specifically, we will find out everything about DevOps Lifecycle. DevOps Lifecycle that will provide a clear explanation on the reason for devops. It is divided into six distinct phases that will give you an understanding of the reasons behind Devops:
Source Code Management - In this phase, business owners and the software development team will discuss goals for the project and develop a strategy. Programmers develop and code the app using tools such as Git to save the code of the application.
Continuous Test and Continuous Build - This step is about building tools, such as Maven and Gradle using the code from various repositories and combining them to create the entire application. The program is then tested using automated testing tools like Selenium and JUnit for ensuring that the application is of high-quality.
Continuous Integration - Once testing is completed the new features are added automatically into the codebase already in place.
Continuous Deployment: Here software is packaged following it has been released and then moved to the development server to the production server. After the software has been installed, operations teams carry out tasks, like configuring servers and then provisioning servers with the necessary resources.
Continuous Monitoring Monitoring allows IT companies to spot problems with specific releases and assess the effect on the end-users.
Software Released - When all the steps are completed and the program meets the requirements of the customer the software is released to the market.
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